JP4763060B2 - Method and apparatus for increasing terminal waiting time through efficient processing of allocated slots in a mobile communication system - Google Patents

Description

  The present invention relates to a synchronous mobile communication system (cdmaOne / cdma2000 1x), and more particularly, to a method and apparatus for increasing battery standby time of a terminal (User Equipment: UE) through efficient processing of assigned slots.

In a synchronous mobile communication system, a UE searches for a call channel in a standby state, and receives and processes call information and control information. At this time, the UE operates in a slotted mode or a non-slotted mode. In the slot mode, all call channels are divided into 80 ms slots, and the UE searches only for the slots promised between the UE and the base station (Node B). In the non-slot mode, the UE searches all slots. Here, the slot includes four frames each having a data processing unit of 20 ms. When the mobile communication system operates in slot mode, the UE transitions to an active state only during an assigned slot, searches for a call channel, does not search for a call channel during an unassigned slot, Enter sleep mode. During the sleep state, battery power consumption is reduced by disabling radio frequency (RF), modem, central processing (CPU), and other hardware operations.
At this time, the Node B and the UE can calculate the promised slot using the following equation (1).

  In Equation 1, “t” indicates a system time in units of 20 ms, “PGSLOT” indicates a value commonly known by the Node B and the UE through the UE's unique telephone number, and a value from 0 to 2047 according to the UE. Have. “I” means a slot cycle index indicating a call channel search period, and has a value of 0 to 7. When the value of the slot cycle index is increased, the call channel search period is increased, thereby increasing the time during which the UE stays in the sleep state. For example, if “i” has a value of “0”, the assigned slot is searched once every 1.28s and assigned if “i” has a value of “2”. Slots are searched once every 5.12s. During the standby state, the UE typically operates in slot mode.

  The case where the UE operates in the non-slot mode will be described with reference to the call message field shown in FIG.

1. The UE operates in non-slot mode when the control information is changed (ie, the current control information that the UE has is not valid).
The control information includes Node B configuration information and access parameter information. When the Node B configuration information is changed, it can be understood by checking the CONFIG_MSG_SEQ field included in the Node B configuration message and the call message. Since the UE must further receive all Node B configuration messages when the Node B configuration information is changed, the UE updates the Node B configuration information as soon as possible by operating in non-slot mode. . Further, when the access parameter information is changed, it can be understood by checking the ACC_MSG_SEQ field included in the access parameter message and the call message. Similarly, when the access parameter information is changed, the UE updates the access parameter information by operating in the non-slot mode.

2. The UE sends a message to the Node B via the access channel “ACH” and waits for the response of the corresponding message, and the UE operates in non-slot mode.
Since the message transmission through the access channel is performed via a connectionless communication that is not connected by a logical path for connection to the Node B, the UE needs to receive a transfer response. In this case, even if the assigned slot is passed, the UE should not enter the sleep state before receiving a response to the message.

3. When UE is configured to operate in non-slot mode Except for the three cases described above, the UE can also enter slot mode to reduce power consumption.

  FIG. 1 shows a slot configuration in a conventional mobile communication system. Various types of messages are arranged according to a predetermined rule. In FIG. 1, a call channel of 20 ms frame unit is shown, and a configuration of one allocated slot is shown.

  In a paging channel, a mobile addressed message (Mobile Addressed Message), for example, an ORDM (ORDer Message) and an ECAM (Enhanced Channel Assignment Message) is transmitted from a Node B to a specific UE, and is generally the front of the paging channel. Located in. If there is no message transmitted from the Node B to the UE, the corresponding part is omitted. The next part of the front part is inserted with a general call message (GPM) used when the Node B calls a specific UE, and the remaining part of the slot is common to all UEs registered with the Node B. It is filled with an overhead message (OverHeaD message: OVHD) including configuration information and access information transmitted to. FIG. 1 shows the earliest location where one UE can switch to sleep in an assigned slot.

  When operating in slot mode, the UE searches for assigned slots. If there is no call information associated with the UE and the configuration information stored in the UE is confirmed to be valid, the UE enters a sleep state. On the other hand, if there is call information between the assigned slots or the configuration information is changed, the UE does not enter the sleep state and performs or changes the operation necessary for the call connection. Configuration information must be received. However, in this case, the UE does not need to search all assigned slots. The reason is that if the UE confirms only part of the content of the first call message received in the assigned slot, the UE does not check the content of the next message in the assigned slot and enters the sleep state. This is because it can be done.

  For example, in the case of cdma2000 1x, the general call message (GPM) includes a CONFIG_MSG_SEQ field indicating whether the Node B configuration information is changed, an ACC_MSG_REQ field indicating whether the access parameter information is changed, and the UE. A CLASS_0_DONE field, a CLASS_1_DONE field, a TMSI_DONE field, and a BROADCAST_DONE field (hereinafter referred to as a DONE field) indicating whether or not a call message of each group to which the group belongs exists in a slot allocated according to each corresponding group; And a PAGE_RECORD field indicating the unique number of the UE called. Among these fields, when the value of the CONFIG_MSG_SEQ field or the value of the ACC_MSG_SEQ field is changed to a value other than the value stored in the UE, the Node B configuration information or access parameter information must be updated.

  Here, via the DONE field registered in the UE, the UE can check whether it is necessary to receive a message that comes after the currently received general call message. For example, if the DONE field has a value of “1”, the UE does not need to receive the next message in the assigned slot, but if the DONE field has a value of “0”, the UE The next message must be received continuously. That is, after confirming the field of the general call message, if there is no configuration information and / or access information to be updated and it is not necessary to confirm the next message, the UE can switch to the sleep state. Although the processing for the general call message in the cdma2000 1x system has been described as an example, the operation as described above can be performed in the cdmaOne system by checking the field of the call message (PM).

As described above, the UE can switch to the sleep state in the slot mode, thereby reducing power consumption.
Usually, since the UE operates in slot mode, the earlier the transition to the sleep state, the lower the power consumption. Therefore, there is a need for a quick sleep state entry method.

FIG. 3 is a diagram illustrating a conventional call channel processing operation. In particular, FIG. 3 switches to the sleep state after the UE starts operating at the slot boundary and receives and processes the message.
The roll boundary indicates the start time of a pseudo PN code having a period of 26.666 ms used in the synchronous mobile communication system.

  When the UE is in the sleep state, the state of the PN code is not updated. In this case, since the state of the PN code of the Node B is continuously updated, when the UE wakes up from the sleep state, the state of the PN code of the Node B is adjusted to match the Node B PN code. Must perform the actions to be performed. For this reason, the prior art is designed to allow sleep state entry and active state entry only at the roll boundary.

  On the other hand, the UE generally demodulates the call channel data by using a Viterbi decoder (not shown). The Viterbi decoder reports a demodulation result to the processor via an interrupt every 20 ms based on the slot boundary. Here, the “processor” may be a general processing unit of the UE, an application of the control unit, or software.

  Therefore, as shown in FIG. 3, a conventional UE processing a paging channel in an active state causes a decoding delay due to a Viterbi decoder. That is, when a 20 ms interrupt occurs, the data reported from the decoder to the processor includes a part of data of the previous frame and a part of data of the current frame. This is because the conventional call channel processing method processes call channel data in units of 20 ms frames.

  As a result, in order for the UE to enter the sleep state, the Viterbi decoder can process the second decoder interrupt # so that the processor can process the data of the first frame in the assigned slot. Must wait until 2 occurs, after which the UE can enter the sleep state at the second roll boundary.

  That is, a part of the data # 1 obtained from the decoder interrupt # 1 of the first frame and the data # 2 obtained from the decoder interrupt # 2 of the second frame due to the decoding delay is in units of 20 ms frames. After being processed, it is determined whether or not to enter the sleep state based on the result of the processed data.

  In this case, before the processor performs the first processing operation on the call channel data, the processor must actually wait for 40 ms after the slot is started.

  When the first frame data includes a call information to be updated and a general call message without control information, the UE can switch to the sleep state at the roll boundary after the first frame data. . However, if the above condition is not met, the second frame must be used to determine whether to switch to the sleep state, so that the actual switch to the sleep state is further delayed. To do.

  As described above, the earliest point in time when the UE switches to the sleep mode is the second roll boundary according to the conventional procedure of starting the operation at the slot boundary, receiving and processing the message, and performing the switching operation to the sleep state. There was a problem that it can be converted with.

This has the problem that the time point for switching the sleep state of the UE is delayed, which unnecessarily increases the time for maintaining the RF receiving unit in the on state.
Therefore, it is necessary to develop an efficient sleep state entry method considering such a decoding delay.

  Accordingly, the present invention has been proposed to solve the above-described problems of the prior art, and its purpose is to provide a battery standby time of a UE through variable processing of slots allocated in a mobile communication system. It is an object of the present invention to provide a method and an apparatus for increasing the load.

  Another object of the present invention is to process the frame data of the assigned slot in half frames so as to reduce the processing delay of the processor to the maximum, so that the UE enters the sleep state even at the first roll boundary. It is an object of the present invention to provide a method and an apparatus capable of performing the above.

  A further object of the present invention is to process the data transferred to the decoder after the start of the slot, first in half-frame units, and then in full-frame units, so as to switch to the sleep state. Method and apparatus capable of quickly determining and consequently reducing power wasted during the time of one roll generated in the prior art through the transition to sleep state one roll (26.666 ms) early Is to provide.

  It is still another object of the present invention to reduce the processing delay when processing assigned slots in a mobile communication system, so that the processor does not upload data to an upper layer and a desired field in a lower layer. It is an object of the present invention to provide a method and an apparatus for quickly determining whether or not to enter a sleep state using a direct confirmation method.

  In order to achieve the above object, according to one aspect of the present invention, a method for increasing a waiting time of a UE (UE) through efficient processing of slots allocated in a mobile communication system is as described above. When the assigned slot is processed, processing a first half frame of the assigned slot; confirming a general call message located in the first half frame; and the general call message Performing the operation of switching to the sleep state when the call information and control information to be updated are not included.

  According to another aspect of the present invention, an apparatus for increasing the waiting time of a terminal (UE) through efficient processing of allocated slots in a mobile communication system is provided for deinterleaving and decoding received signals. To determine whether the frame corresponds to the first frame in the slot to which the frame is assigned and the frame corresponds to the first frame. By outputting only the half frame and outputting the next frame of the half frame in units of full frames, the output frame is decoded by the decoding process of the sleep driver. The data output controller to receive the half-frame data and the general call message Check the field, characterized in that it comprises a and a sleep controller decides whether to enter in the sleep state.

  According to the present invention, in order to generate a service guide in a portable broadcasting system, SG-G receives sources necessary for generating a service guide from CC, BSA, and BSM. Using the provided information, SG-G generates a final service guide based on the data model described in FIG. Even if such information on the service guide is a response to a request for service guide related information transmitted from the mobile terminal to the BSM, the BSA is identical to the BSM and BSA as basic information for generating charging information for the service. The final information on the service guide generated by the method is required. For this purpose, the BSD / A provides the generated service guide to the BSM and BSA or, if necessary, the BSM or BSA sends a request for service guide information to the BSD / A to respond. Information can be received.

  In addition, when receiving a request for price information from the mobile terminal in the service supply process, if the BSM should provide a service guide fragment for the purchase information related to the BSM, the BSM sends the corresponding information directly to the mobile terminal. Or the corresponding information provided from the BSD / A can be received and the received information can be transmitted to the mobile terminal.

  Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings. In the following description, for the purpose of clarifying only the gist of the present invention, a detailed description of related known functions or configurations is omitted. In the drawings, the same reference numerals and numbers are used in common for the same components and parts as much as possible. And the term mentioned later is a term defined in consideration of the function in the present invention, and this may change according to the intention or practice of the user and the operator. Therefore, these definitions must be defined based on the entire contents of the present invention.

  The present invention can allow the frame data of the assigned slot to be processed in half-frame units, and by reducing the processing delay of the processor to the maximum, the UE can enter the sleep state even at the first roll boundary. A method and apparatus for enabling entry is disclosed.

  According to the present invention, the frame data of the allocated slot is first processed in units of half frames, so that the UE can further quickly switch to the sleep state. Therefore, the present invention has an advantage that the waiting time of the UE is remarkably increased.

  In other words, according to the prior art, since the data of the calling channel is processed in units of frames, there is a problem that switching to the sleep state is performed at the second roll boundary next to one slot boundary at the earliest. . On the other hand, the present invention makes it possible to enter the sleep state even at the time of one roll after the slot boundary by processing the data of the first frame of the slot to which the UE is assigned in half frame units.

  In the same synchronous mobile communication system, when there are a plurality of UEs operating in the slot mode, the same slot can be assigned to the plurality of UEs. Therefore, Node B can call multiple UEs using one slot.

  If the Node B does not need to call any UE and does not have control information updated in a particular slot, half frame # 1 (410) contains a general call message, where the general call The message corresponds to a null general call message that has no call information.

FIG. 4 is a diagram illustrating a call channel processing operation according to an embodiment of the present invention.
If the first half frame of the slot contains a call information to be updated and a null general call message without control information, the UE goes to sleep after confirming only half frame # 1 (410). It can be converted quickly. If the data content of the first half frame does not match the rapid sleep state transition condition, the UE uses the next 20 ms frame including half frames # 2 (420) and # 3 (430) to transmit data. It can be checked once again whether the content matches the quick sleep state change condition. If half frame # 3 (430) in the frame data obtained through the second decoder interrupt satisfies the sleep state change condition, the UE enters the sleep state at roll boundary # 3. Unlike the prior art, the present invention allows the UE to enter the sleep state at roll boundary # 2.

  FIG. 2 illustrates a general call message, which corresponds to a null general call message with no content in the information field associated with the call. The general call message does not include the PAGE_RECORD and ADD_PFIELD fields, but has a total of 72 bits including a 2-bit PDU_PADDING field excluding the 1-bit start message (SOM). Thus, the general call message can include a complete message including CRC bits within a 10 ms half frame. As described above, in order for the UE to switch to the sleep state in the first frame, all of the following four conditions must be satisfied.

1. Does the first message in the contents of the first frame correspond to the general call message?
2. If it is a general call message, is there no information to call itself?
3. Has the control information currently stored in the UE been changed?
4). Does the DONE field indicating the necessity of receiving the message following the general call message have a value of “1”?

  Further, when the processor processes the call channel data, a processing delay is caused by the processor. When using a low-speed processor as in the UE, a larger processing delay is generated by the processor. Therefore, in order to minimize the processing delay, the processor must process the demodulated data as soon as the decoder interrupt is generated. Even if the time difference between roll boundary # 1 and decoder interrupt # 1 is 6.666 ms, a time margin (Margin) is required to switch the hardware to the sleep state. If the processing delay by the processor exceeds the above time margin, the UE can only switch to the sleep state at roll boundary # 2 that is not roll boundary # 1 after 26.666 ms, thus minimizing the processing delay. It is important to make it.

  In the synchronous mobile communication system, in order to confirm the field of the general call message, it is necessary to demodulate the frame data in the physical layer, generate one message in the link access control layer, and then transfer the message to the signaling layer There is. Here, description has been made with reference to an example in which a general call message of the cdma2000 1x system is processed. However, in the cdmaOne system, when the field of the call message is confirmed, an operation similar to the above-described operation may be performed. it can. When the content of the message is confirmed via the procedure described above, the processing delay by the processor is considerably increased.

  The method and apparatus according to the present invention minimizes the processing delay by the processor by pre-processing the general call message in the lower layer without going through the above-described procedure, and thus for the transition to the hardware sleep state. Secure time margin.

FIG. 5 is a flowchart illustrating a procedure for quickly switching to a sleep state according to an exemplary embodiment of the present invention.
In step 505, the first decoder is interrupted and data is generated in 20 ms. In step 510, it is determined whether or not the data obtained in step 505 corresponds to the data demodulated first at the start time of the assigned slot after returning from the sleep state. As a result of the determination, if the data corresponds to demodulated data, the process proceeds to step 515, and after processing half frame # 1 first, the process proceeds to step 525. On the other hand, if the data does not correspond to the demodulated data in step 510, the process proceeds to step 520, where the remaining half frame of the previous decoder interrupt and the front half frame of the current decoder interrupt are connected, After creating a full frame, go to step 525.

  In step 525, it is checked whether or not the first message means a general call message in the contents of the first frame. That is, it is first checked whether the start message (SOM) field in the call message has a value of “1”. Therefore, when a new message is started, the SOM field must always have a value of “1”. If no call information exists between the assigned slots, half frame # 1 is configured with a null general call message. If the SOM field has a value of “1”, the process proceeds to step 530. The next 8 bits after the SOM bit correspond to a field indicating the message length “MSG_LEN” in bytes, and the null general call message has a length of 9 bytes. Therefore, if it is determined in step 530 that the length of the message recorded in the message length field is 9 bytes, the process proceeds to step 535.

  If it is determined in step 535 that the next 8-bit message type “MSG_TYPE” field of the message length field has a code of “0x11”, which is a unique number of the general call message, the corresponding message is a 5-byte message. Since it is a null general call message having a length, go to step 540. In step 540, the 6-bit CONFIG_MSG_SEQ field and the 6-bit ACC_MSG_SEQ field, which are sequentially next to the message type “MSG_TYPE”, are checked to see if the configuration information has been updated. If it is confirmed that the configuration information does not need to be updated, the process proceeds to step 545 to finally check the DONE field. If the DONE field has a value of “1”, this indicates that the current value of the null general call message has satisfied all conditions, and can be immediately switched to the sleep state at step 550. Further, when half frame # 1 satisfies the above condition, the lower layer can perform the determination on the transition to the sleep state without the determination by the signaling layer (upper layer), so that the processing delay by the processor To enable the UE to quickly switch to the sleep state.

  However, if any one of the conditions from step 525 to step 545 is not satisfied, after performing a general processing operation to transfer the message to the link access control layer and the signaling layer in order to process the message. The above procedure returns to step 505.

  Here, the description has been given with reference to an example in which a general call message is processed in the cdma2000 1x system. However, when a call message in the cdmaOne system is processed, by performing an operation similar to the above-described operation, A quick transition to sleep is possible.

FIG. 6 is a diagram illustrating a configuration of a UE according to an embodiment of the present invention.
The transmitted signal is received by the receiver 610 and is input to the decoder 630 after undergoing a deinterleaving process via the deinterleaver 620. The decoder 630 performs a decoding operation on the deinterleaved signal, and transfers the decoded signal to the message parser 660 or the sleep state controller 680 according to the control signal input from the data output controller 650. .

  The data output controller 650 determines whether the corresponding frame is the first frame in the assigned slot. As a result of the determination, if the corresponding frame is the first frame, the data output controller 650 includes only the half frame in the output data of the decoder 630 and the message parser 660 and the sleep state controller 680. When the corresponding frame is the second frame or a subsequent frame, the data output controller 650 causes the full frame to be transferred to the message parser 660 and the sleep state controller 680. To. The message parser 660 analyzes the data received from the decoder 630 and then transfers the analyzed data to the message processor 670. The sleep state controller 680 determines whether to enter the sleep state by processing the half frame received from the decoder 630 or based on the processing result received from the message processor 670. Determine whether to enter the state.

  Specifically, when a half frame is received from the decoder 630, the sleep state controller 680 can check the GPM field, and thus before receiving a processing signal from the message processor 670 that processes the upper layer. It is also possible to determine whether or not to enter the sleep state. If the sleep state controller 680 determines that the current time corresponds to a point in time when the sleep state controller 680 can switch to the sleep state, the sleep state controller 680 sends a control signal for switching to the sleep state to the sleep driver. 640 to cause the UE to switch to the sleep state.

  Compared with the prior art, the present invention allows the UE to switch to the sleep state more quickly, so that the waiting time of the UE can be improved. In the cdma2000 1x / cdmaOne commercial network, as a result of confirming the improvement of the waiting time through the test, most UEs operating in the slot mode satisfy the slot state change condition in the first half frame, On the night when the paging message is transmitted, almost all UEs operating in slot mode satisfy the slot state change condition in the first half frame.

  Therefore, when the slot state change condition is satisfied in the first half frame, it is assumed that the active state holding time of the UE according to the conventional method is 100 ms in order to process the assigned slot for each cycle. Then, the active state holding time of the UE according to the present invention is reduced to 73.33 ms. As a result, when no call or handoff occurs, no control information is updated, and the slot state change condition is satisfied in the first half frame in all assigned slots, the power consumption is Is reduced by 26.66%.

  Also, when 50% of all allocated slots satisfy the slot state change condition in the second half frame, and the remaining 50% satisfy the slot state change condition in the first half frame. Correspondingly, the power consumption is reduced by 13.33% compared to the prior art.

  Although the present invention has been described in detail with reference to specific embodiments, it is understood that various modifications can be made without departing from the scope and spirit of the present invention. The scope of the present invention should not be limited to the above-described embodiments, but should be defined within the scope of the appended claims and their equivalents.

It is a figure which shows the structure of the slot in the conventional mobile communication system. It is a figure which shows the field of a general call message. It is a figure which shows the conventional call channel processing operation. FIG. 6 illustrates a call channel processing operation according to an embodiment of the present invention. FIG. 6 is a diagram illustrating a procedure for a quick transition to a sleep state according to an embodiment of the present invention. It is a figure which shows the structure of the terminal by embodiment of this invention.

Explanation of symbols

410 Half frame # 1
420 Half frame # 2
430 Half frame # 3
610 Receiver 620 Deinterleaver 630 Decoder 640 Sleep driver 650 Data output controller 660 Message parser 670 Message processor 680 Sleep state controller

Claims (7)

A method for increasing a waiting time of a terminal (UE) through efficient processing of slots allocated in a mobile communication system, comprising:
Processing a first half-frame of the assigned slot as the assigned slot is processed;
Confirming a general call message located in the first half frame;
If the general call message does not have updated call information and control information, performing a switching operation to the sleep state;
A method comprising the steps of: 2. When the allocated slot is processed, it is determined whether or not to switch to the sleep state by checking a field of a call message processed in a lower layer of a processor. The method described in 1. When the first half frame does not include the general call message, the frame that comes next to the first half frame is processed in units of full frames, thereby switching to the sleep state via the full frame. The method of claim 1, further comprising performing an act of determining. The general call message is confirmed as a null general call message having no call information and control information to be updated. In the general call message, a start message (SOM) field has a value of “1”, and the message length The “MSG_LEN” field has a value of “9”, the message type “MSG_TYPE” field has a value indicating a general call message, and the configuration information “CONFIG_MSG_SEQ” field and the access parameter information “ACC_MSG_SEQ” field are not updated. The DONE field including CLASS_0_DONE, CLASS_1_DONE, TMSI_DONE, and BROADCAST_DONE indicating whether or not a message is received has a value of “1”. The method according to 1. An apparatus for increasing a waiting time of a terminal (UE) through efficient processing of slots allocated in a mobile communication system,
A sleep driver for performing deinterleaving and decoding of a received signal and driving a sleep state;
It is determined whether or not the frame corresponds to the first frame in the assigned slot, and when the frame corresponds to the first frame, only the half frame is output, and the half frame A data output controller that causes the output frame to be decoded by a decoding process of a sleep driver by causing the next frame to be output in units of full frames,
A sleep state controller that receives the half-frame data, checks a field of a general call message, and determines whether to enter the sleep state;
The apparatus characterized by including. When full frame data is received from the sleep driver, the received signal is analyzed, and a message parser that outputs the analyzed signal;
If the Verify the analyzed signal received from the message parser, corresponding to the call information and null general page message having no control information the full frame general paging message located within is updated, before Symbol apparatus according to claim 5, characterized in that general call message contains a message processor for notifying the sleep controller that corresponds to the null general page message. The sleep state controller confirms that the general call message is a null general call message that does not have the updated call information and control information. In the general call message, a start message (SOM) field is set. It has a value of “1”, the message length “MSG_LEN” field has a value of “9”, the message type “MSG_TYPE” field has a value indicating a general call message, the configuration information “CONFIG_MSG_SEQ” field, and The update of the access parameter information “ACC_MSG_SEQ” field is unnecessary, and the DONE field including CLASS_0_DONE, CLASS_1_DONE, TMSI_DONE, and BROACAST_DONE indicating whether or not the corresponding group is called. Apparatus according to claim 5 field is characterized by having a value of "1".

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